WO2015118820A1 - Dispositif doté d'une fonction de localisation, dispositif de réception des résultats de localisation et système utilisant les résultats de localisation - Google Patents

Dispositif doté d'une fonction de localisation, dispositif de réception des résultats de localisation et système utilisant les résultats de localisation Download PDF

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Publication number
WO2015118820A1
WO2015118820A1 PCT/JP2015/000252 JP2015000252W WO2015118820A1 WO 2015118820 A1 WO2015118820 A1 WO 2015118820A1 JP 2015000252 W JP2015000252 W JP 2015000252W WO 2015118820 A1 WO2015118820 A1 WO 2015118820A1
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WO
WIPO (PCT)
Prior art keywords
positioning
positioning result
authentication level
unit
authentication
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PCT/JP2015/000252
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English (en)
Japanese (ja)
Inventor
貴久 山城
正剛 隈部
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株式会社デンソー
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Publication date
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Priority to DE112015000673.7T priority Critical patent/DE112015000673T5/de
Priority to SG11201605589PA priority patent/SG11201605589PA/en
Priority to CN201580007470.3A priority patent/CN105980883B/zh
Publication of WO2015118820A1 publication Critical patent/WO2015118820A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
    • G01S19/215—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service issues related to spoofing
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0825—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/321—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving a third party or a trusted authority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3271—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using challenge-response
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/16—Anti-collision systems
    • G08G1/161—Decentralised systems, e.g. inter-vehicle communication
    • G08G1/163—Decentralised systems, e.g. inter-vehicle communication involving continuous checking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/34—Encoding or coding, e.g. Huffman coding or error correction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/84—Vehicles

Definitions

  • the present disclosure relates to a device with a positioning function that measures the position of its own device based on a signal received from an artificial satellite used in a satellite positioning system, and a positioning result receiving device that receives information on a position measured by the device with the positioning function And a positioning result use system including the positioning function-equipped device and the positioning result receiving device.
  • Patent Document 1 discloses a technique for authenticating whether a signal received by the device itself is a legitimate signal from an artificial satellite used in a satellite positioning system.
  • the receiver accesses the authentication center database from the satellite number and the satellite time included in the signal received by the device itself from the artificial satellite, and uses the data for the authentication of the target artificial satellite. To get. Then, the receiver uses the data acquired from the authentication center to authenticate whether the signal received by the device is a normal signal from an artificial satellite used in the satellite positioning system.
  • the positioning result at the receiver is used in an application or system that uses location information
  • the positioning result in a system that charges a parking fee according to the location, the positioning result must be highly reliable. It is thought that it is necessary to wait until all the authentications are completed. On the other hand, in applications such as games that use location information, the reliability of positioning results may be low, so waiting for all the above authentications to complete before outputting the positioning results at the receiver will waste time. turn into.
  • the present disclosure has been made in view of the above points, and an object of the present disclosure is an application or system that uses a positioning result obtained based on a signal from an artificial satellite used in a satellite positioning system. It is an object of the present invention to provide a device with a positioning function, a positioning result receiving device, and a positioning result utilization system that make it possible to flexibly utilize positioning results according to the reliability of positioning results required for the operation.
  • An apparatus with a positioning function is based on a satellite receiver that receives signals from a plurality of artificial satellites used in a satellite positioning system, and a signal received from a plurality of artificial satellites by the satellite receiver.
  • Information for authentication that acquires the positioning unit that measures the position of its own device and the authentication information necessary for authenticating that it is a legitimate signal from an artificial satellite from an authentication center provided outside of its own device
  • the authentication level calculation unit that calculates the authentication level based on at least one of the number and the ratio of the artificial satellites that can be authenticated by the authentication unit, and the positioning result measured by the positioning unit other than the own device Measurements sent to the device
  • a result sending unit, positioning result transmission processor when transmitting the positioning result, also transmits to grant authorization level calculated by the authentication level calculation unit.
  • this device with a positioning function, among the plurality of artificial satellites used for positioning in the positioning unit, at least one of the number and ratio of artificial satellites that can be authenticated using the authentication information acquired from the authentication center.
  • a device that receives a positioning result (hereinafter, a device on the receiving side) can obtain the authentication level based on the authentication level. Since it takes time to perform authentication using the authentication information acquired from the authentication center, it is considered that a situation where only a part of the artificial satellite used for positioning by the positioning unit can be authenticated frequently occurs. As described above, even when only a part of the artificial satellite used for positioning can be authenticated, the receiving-side apparatus can determine how reliable the positioning result is based on the authentication level. Become.
  • positioning results are determined according to the reliability of the positioning results required for that application or system. It will be possible to use it flexibly.
  • the positioning result receiving device measures the position of the own device based on signals received by the satellite receiver from a plurality of artificial satellites used in the satellite positioning system, and received by the satellite receiver.
  • a positioning result reception processing unit that receives a positioning result transmitted from a device with a positioning function that authenticates that the signal is a legitimate signal from an artificial satellite, and a process that uses the positioning result received by the positioning result reception processing unit It is determined whether or not to use the positioning result for the positioning result use processing according to the execution unit that executes the positioning result use processing and the authentication level given to the positioning result received by the positioning result reception processing unit.
  • a use determination unit receives a positioning result to which an authentication level is given based on at least one of the number and ratio of artificial satellites that have been authenticated among the artificial satellites used for positioning by the device with a positioning function. .
  • the reliability of the positioning result depends on the authentication level. It becomes possible to judge whether. Therefore, according to the level of the authentication level, it is possible for the usage determining unit to determine whether to execute an application or system that uses the positioning result. For example, even when the authentication level is low, it is possible to determine that an application or system having a low reliability of a required positioning result is to be executed.
  • positioning results are determined according to the reliability of the positioning results required for that application or system. It will be possible to use it flexibly.
  • the positioning result utilization system includes the apparatus with a positioning function according to the first aspect of the present disclosure and the positioning result receiving apparatus according to the second aspect of the present disclosure.
  • the positioning results are flexible depending on the reliability of the positioning results required for the applications and systems. It will be possible to make use of it.
  • a device with a positioning function includes a satellite receiver that receives signals from a plurality of artificial satellites used in a satellite positioning system, and a signal that is received from a plurality of artificial satellites by the satellite receiver. And a positioning unit that measures the position of the device itself, and authentication for obtaining authentication information necessary for authenticating that the signal is a legitimate signal from an artificial satellite from an authentication center provided outside the device.
  • An authentication level calculation unit that calculates an authentication level based on at least one of the number and ratio of artificial satellites that can be authenticated by the authentication unit among the satellites used for positioning, and a process that uses the positioning results measured by the positioning unit Positioning results Comprising an execution unit for executing usage processing, according to the authentication level calculated by the authentication level calculation unit, and the usage determining unit that determines whether to use positioning the positioning result to the positioning result utilization process by the positioning unit.
  • this device with a positioning function among the plurality of artificial satellites used for positioning in the positioning unit, at least one of the number and ratio of artificial satellites that can be authenticated using the authentication information acquired from the authentication center.
  • a device with a positioning function can obtain the authentication level based on it. Since it takes time to perform authentication using the authentication information acquired from the authentication center, it is considered that a situation where only a part of the artificial satellite used for positioning by the positioning unit can be authenticated frequently occurs. Thus, even when only a part of the artificial satellite used for positioning can be authenticated, the device with a positioning function can determine how reliable the positioning result is based on the authentication level. Become.
  • the usage determining unit determines whether to execute an application or system that uses the positioning result. For example, even when the authentication level is low, it is possible to determine that an application or system having a low reliability of a required positioning result is to be executed.
  • the positioning results can be flexibly changed according to the reliability of the positioning results required for the applications and systems. It becomes possible to be able to utilize.
  • FIG. 1 is a diagram illustrating an example of a schematic configuration of a positioning result use system according to Embodiment 1 of the present disclosure.
  • FIG. 2 is a block diagram showing an example of a schematic configuration of the authentication center.
  • FIG. 3 is a block diagram illustrating an example of a schematic configuration of the in-vehicle device according to the first embodiment.
  • FIG. 4 is a flowchart illustrating an example of the flow of authentication-related processing in the in-vehicle device according to the first embodiment.
  • FIG. 1 is a diagram illustrating an example of a schematic configuration of a positioning result use system according to Embodiment 1 of the present disclosure.
  • FIG. 2 is a block diagram showing an example of a schematic configuration of the authentication center.
  • FIG. 3 is a block diagram illustrating an example of a schematic configuration of the in-vehicle device according to the first embodiment.
  • FIG. 4 is a flowchart illustrating an example of the flow of authentication-related processing in the in-vehi
  • FIG. 5 is a flowchart illustrating an example of a flow of position information transmission related processing in the in-vehicle device according to the first embodiment.
  • FIG. 6 is a flowchart illustrating an example of a flow of position information use related processing in the roadside device in the first embodiment.
  • FIG. 7 is a flowchart illustrating an example of a flow of a road billing related process in the roadside device according to the second modification of the present disclosure.
  • FIG. 8A is a schematic diagram for explaining position information having continuity
  • FIG. 8B is a schematic diagram for explaining position information having no continuity
  • FIG. 9 is a flowchart illustrating an example of the flow of the parking billing related process in the roadside device in the third modification of the present disclosure, FIG.
  • FIG. 10 is a diagram illustrating an example of a schematic configuration of the positioning result use system according to the second embodiment of the present disclosure.
  • FIG. 11 is a block diagram illustrating an example of a schematic configuration of the position information utilization device.
  • FIG. 12 is a diagram illustrating an example of a schematic configuration of the positioning result use system according to the third embodiment of the present disclosure.
  • FIG. 13 is a block diagram illustrating an example of a schematic configuration of a mobile terminal.
  • FIG. 14 is a flowchart illustrating an example of a flow of position information use related processing in the mobile terminal according to the third embodiment.
  • FIG. 15 is a flowchart illustrating an example of a flow of road charging related processing in the mobile terminal in the second modification.
  • FIG. 16 is a flowchart illustrating an example of the flow of parking charge related processing in the mobile terminal according to the third modification of the present disclosure.
  • the positioning result utilization system 1 in Embodiment 1 includes a monitor station 110, an authentication center 120, a master control station 130, an in-vehicle device 200, and a roadside device 300.
  • the in-vehicle device 200 corresponds to a device with a positioning function
  • the roadside device 300 corresponds to a positioning result receiving device.
  • the monitor station 110 receives GPS radio waves transmitted by the GPS satellites 2a to 2c included in the GPS which is one of the satellite positioning systems.
  • the GPS satellites 2a to 2c correspond to artificial satellites.
  • the GPS satellites 2a to 2c are expressed as GPS satellites 2 if they are not distinguished from each other.
  • a GPS message includes a navigation message (NAVI MSG).
  • the monitor station 110 demodulates the received GPS radio wave, extracts a navigation message, and sends it to the authentication center 120.
  • a navigation message corresponds to a signal from an artificial satellite.
  • GPS radio waves are received from a plurality of GPS satellites 2
  • a navigation message is extracted from each GPS radio wave and sent to the authentication center 120.
  • the authentication center 120 creates parity data from the navigation message and the H matrix that is the encryption key. Then, a signal including this parity data is sent to the master control station 130. In addition, communication with the in-vehicle device 200 is also performed. A detailed description of the authentication center 120 will be given later with reference to FIG.
  • the master control station 130 transmits the parity data received from the authentication center 120 to the quasi-zenith satellite (hereinafter, QZS satellite) 3.
  • the QZS satellite 3 broadcasts a navigation message including parity data toward the ground.
  • the in-vehicle device 200 is a navigation message authentication type in-vehicle device used for a moving body, for example, a vehicle.
  • the in-vehicle device 200 communicates with the authentication center 120 to authenticate that the navigation message received from the GPS satellite 2 is a regular navigation message. Authentication is sequentially performed for all GPS satellites 2 used for positioning. However, since it takes time, some GPS satellites are used until the authentication of all GPS satellites 2 used for positioning is completed. There arises a situation where only two are authenticated. Details of the authentication will be described later with reference to FIG.
  • the in-vehicle device 200 measures the current position of the own device using the navigation message received from the plurality of GPS satellites 2. It is necessary to use navigation messages received from at least three GPS satellites 2 for positioning the current position.
  • the in-vehicle device 200 calculates the ratio of the GPS satellites 2 that have been able to authenticate the above navigation message among the GPS satellites 2 used for positioning.
  • the ratio of the GPS satellites 2 that have been able to authenticate the navigation message among the GPS satellites 2 used for positioning is referred to as an authentication level (AUTH LV).
  • AUTH LV the ratio of the GPS satellites 2 that have been able to authenticate the navigation message among the GPS satellites 2 used for positioning.
  • the authentication level is 1/3 (that is, 33.3%).
  • the calculated authentication level is assigned to the position information (POSI INFO) indicating the measured current position, and wirelessly transmitted to the outside.
  • the roadside device 300 is a terminal of a system that executes a process of providing a predetermined service using position information transmitted from the in-vehicle device 200. For example, in the process of providing the service, when it is determined that the vehicle equipped with the vehicle-mounted device 200 is parked in a toll parking area, or when it is determined that the vehicle has traveled on a toll road, the user of the vehicle There is a billing process for automatically billing.
  • the roadside device 300 determines whether or not to use the position information for the processing using the position information in accordance with the authentication level given to the position information transmitted from the in-vehicle device 200, and determines the determination result. Depending on the location information, it may or may not be used.
  • the authentication center 120 includes a control unit 122, a data storage unit 124, and a communication unit 126.
  • the control unit 122 is a computer that includes a central processing unit (CPU), a read-only memory (ROM), a random access memory (RAM), and the like, and controls the data storage unit 124 and the communication unit 126.
  • the CPU executes a program stored in the ROM while using the temporary storage function of the RAM, so that the RAND message generation unit 1221, the SEED value generation unit 1222, the H matrix calculation unit 1223, the parity calculation unit 1224, It functions as the signal processing unit 1225.
  • the functions of these units 1221 to 1225 may be the same as the functions disclosed in Patent Document 1.
  • the RAND message generator 1221 creates a RAND message (RAND MSG) from the navigation message acquired from the monitor station 110.
  • the RAND message is an abbreviation of Reference Authentication Navigation Data Message. From the bit string of the navigation message, TOW (time of week), TOC (time of clock), clock correction coefficient AF0, clock correction that specify the signal generation time The coefficients AF1 are arranged in order. After that, an AS Flag that is an anti-spoof flag (Anti-Spoof Flag) and a PRN (Pseudo Random Noise) ID that is a satellite number are added. It can be said that RAND including TOW and PRNID is data indicating which GPS satellite transmitted when. Since TOW changes every 6 seconds and includes PRNID, RAND is generated for every GPS satellite 2 received by monitor station 110 and every 6 seconds.
  • the SEED value generation unit 1222 generates a SEED value by generating a random number with the PC clock as an input.
  • the H matrix calculation unit 1223 uses the SEED value generated by the SEED value generation unit 1222 and calculates an H matrix corresponding to the SEED value on a one-to-one basis.
  • a known hash function may be used.
  • a parity check matrix for performing LDPC (Low Density Parity Check) encoding may be used.
  • a generator matrix determined from a parity check matrix may be used.
  • the parity calculation unit 1224 calculates parity data based on the RAND message generated by the RAND message generation unit 1221 and the H matrix calculated by the H matrix calculation unit 1223. That is, parity data is calculated by multiplying the RAND message by this H matrix.
  • the signal processing unit 1225 inserts the parity data calculated by the parity calculation unit 1224 and the RAND message used for the calculation into the navigation message transmitted from the QZS satellite 3. Then, the inserted navigation message is sent to the master control station 130.
  • the signal processing unit 1225 associates the parity data calculated by the parity calculation unit 1224, the RAND message used for calculating the parity data, the H matrix, and the SEED value used for the calculation of the H matrix in accordance with the signal insertion. And stored in the data storage unit 124.
  • the signal processing unit 1225 inserts the RAND message and parity data into the navigation message that causes the QZS satellite 3 to transmit each time the RAND message generation unit 1221 generates the RAND message. Therefore, the RAND message generation unit 1221, the SEED value generation unit 1222, the H matrix calculation unit 1223, and the parity calculation unit 1224 also execute processing each time the RAND message generation unit 1221 generates a RAND message.
  • the H matrix selection unit 1226 converts the H matrix stored in the data storage unit 124 into the received PRNID and TOW. Select the corresponding H matrix. Then, the selected H matrix is encrypted with the public key, and the encrypted H matrix is returned to the in-vehicle device 200.
  • the in-vehicle device 200 includes a communication unit 210, a control unit 220, and a satellite receiver 230.
  • the navigation message broadcast by the QZS satellite 3 is received by the receiving unit 211 provided in the communication unit 210 of the in-vehicle device 200.
  • the communication unit 210 includes a reception unit 211 and a transmission unit 212.
  • the communication unit 210 has a narrow area communication function and a wide area communication function.
  • the narrow area communication function has a communication distance of several hundred meters, for example.
  • the wide-area communication function has a communication distance of several kilometers, for example, and can communicate with other communication devices in the communication area of the public communication network by communicating with the base station of the public communication network.
  • the narrow area communication function communicates with the communication unit 310 of the roadside machine 300, and the wide area communication function communicates with the communication unit 126 of the authentication center 120.
  • the satellite receiver 230 receives radio waves transmitted by the GPS satellite 2 and the QZS satellite 3 at regular intervals.
  • the control unit 220 is a computer including a CPU, a ROM, a RAM, and the like, and controls the communication unit 210 and the satellite receiver 230. Further, the CPU executes the program stored in the ROM while using the temporary storage function of the RAM, thereby executing the authentication related process shown in FIG. 4 and the position information transmission related process shown in FIG.
  • authentication-related processing processing related to authentication that the signal received by the satellite receiver 230 in the control unit 220 of the in-vehicle device 200 is a regular navigation message received from the GPS satellite 2 (hereinafter referred to as authentication-related processing)
  • authentication-related processing processing related to authentication that the signal received by the satellite receiver 230 in the control unit 220 of the in-vehicle device 200 is a regular navigation message received from the GPS satellite 2
  • authentication-related processing processing related to authentication that the signal received by the satellite receiver 230 in the control unit 220 of the in-vehicle device 200 is a regular navigation message received from the GPS satellite 2
  • the satellite receiver 230 mistakenly transmits a signal from a repeater that duplicates a signal from the GPS satellite 2 or a simulator that can artificially generate a signal from the GPS satellite 2 as a navigation message included in the GPS radio wave. It may be received.
  • step S1 the current position of the own device is determined based on a navigation message included in GPS radio waves received from a plurality of three or more GPS satellites 2.
  • This S1 corresponds to a positioning unit.
  • step S2 the navigation message received from the QZS satellite 3 is acquired from the receiving unit 211.
  • step S3 PRNID and TOW are extracted from the navigation message acquired in S1.
  • step S4 the PRNID and TOW extracted in step S3 are transmitted from the transmission unit 212 to the authentication center 120 together with the public key.
  • the authentication center 120 encrypts the H matrix determined by the PRNID and TOW with the public key and transmits the encrypted H matrix to the in-vehicle device 200.
  • step S5 the H matrix transmitted from the authentication center 120 is acquired from the receiving unit 211.
  • This S5 corresponds to an authentication information acquisition unit.
  • step S6 the encrypted H matrix acquired in S5 is decrypted with the secret key.
  • step S7 a RAND message is created from the navigation message including the same PRNID as the PRNID transmitted in step S4 among the navigation messages included in the GPS radio wave received from the GPS satellite 2.
  • step S8 comparison parity data is created from the RAND message created in S7 and the H matrix decoded in S6.
  • step S9 it is determined whether or not the comparison parity data created in S8 matches the parity data extracted in S3.
  • the H matrix decrypted in S6 is the same as the H matrix used by the authentication center 120 to create parity data.
  • the parity calculation unit 1224 of the authentication center 120 calculates parity data based on the H matrix and the RAND message.
  • step S10 if the comparison parity data created in S8 matches the parity data extracted in S3 (YES in S9), the process proceeds to step S10 and authentication is established. On the other hand, if the two parity data do not match (NO in S9), the process proceeds to step S11 and authentication is not established. S9 to S11 correspond to an authentication unit. After S10 and S11, the process proceeds to step S12.
  • step S12 when it is determined whether or not authentication has been established for all the navigation messages used for positioning in S1 (YES in S12), the processing in FIG. 4 ends. On the other hand, if at least one of the navigation messages used for positioning in S1 has not been determined to be established or not established (YES in S12), the process returns to S2 and the process is repeated.
  • position information transmission related processing processing related to transmission of position information to the roadside device 300 in the control unit 220 of the in-vehicle device 200 (hereinafter referred to as position information transmission related processing) will be described with reference to a flowchart shown in FIG.
  • position information transmission related process in addition to the position information indicating the current position measured by the in-vehicle device 200, an authentication level that is the number and ratio of the GPS satellites 2 that have been authenticated among the GPS satellites 2 used for positioning is also given. Then send.
  • the flowchart of FIG. 5 may be configured to start when a position information request signal is received from the communication unit 310 of the roadside device 300, or may be configured to start at a constant cycle.
  • step S21 the current position of the own device measured in step S2 of the flowchart of FIG. 4 is acquired.
  • the acquired current position is stored in an electrically rewritable memory such as a RAM or an EEPROM of the control unit 220.
  • an electrically rewritable memory such as a RAM or an EEPROM of the control unit 220.
  • step S22 an authentication level that is a ratio of the GPS satellites 2 that can be authenticated at the present time in the flowchart of FIG. 4 among the GPS satellites 2 used for positioning of the current position acquired in S21 is calculated. For example, if there are three GPS satellites 2 used for positioning and one GPS satellite 2 can be authenticated, the authentication level is 33.3%.
  • This step S22 corresponds to an authentication level calculation unit.
  • the authentication level may be the number of GPS satellites 2 that can be authenticated. In this case, if there are four GPS satellites 2 used for positioning and four GPS satellites 2 have been authenticated, the authentication level is 4. In addition, it is based on at least one of the number and the ratio, such as a value determined from the number and ratio of the GPS satellites 2 that can be authenticated among the GPS satellites 2 used for positioning, and a value determined from the ratio and the satellite arrangement The value may be the authentication level.
  • step S23 the current position stored in the memory in S21 is read together with the time stamp. Then, transmission data including the position information indicating the read current position, the time stamp, and the authentication level calculated in S22 is generated according to a standard format.
  • the transmission data may include a traveling direction and a vehicle speed of the vehicle on which the in-vehicle device 200 is mounted.
  • vehicle speed a configuration using the one detected by the wheel speed sensor may be used, or a configuration in which the vehicle speed is specified by calculating the moving distance per unit time from the position information of a plurality of points arranged in time series.
  • vehicle traveling direction may be configured to use the one detected by the geomagnetic sensor, or the direction in which the approximate line obtained by the least square method from the position information of a plurality of points arranged in time series extends is the vehicle traveling direction. It is good also as a structure specified as.
  • step S24 the transmission data including the position information, time stamp, and authentication level generated in S23 is transmitted via the transmission unit 212, and the process is terminated.
  • This S24 corresponds to a positioning result transmission processing unit.
  • the roadside machine 300 includes a communication unit 310 and a control unit 320 as shown in FIG.
  • the communication unit 310 performs wireless communication with the communication unit 126 included in the authentication center 120 and the communication unit 210 included in the in-vehicle device 200.
  • the control unit 320 is a computer including a CPU, a ROM, a RAM, and the like, and controls the communication unit 310. Further, the CPU executes the program stored in the ROM while using the temporary storage function of the RAM, thereby executing the usage determination related process shown in FIG.
  • use determination related processing the processing related to the determination of the use of the position information transmitted from the in-vehicle device 200 in the control unit 320 of the roadside device 300 (hereinafter referred to as “use determination related processing”) will be described using the flowchart shown in FIG. Do.
  • use determination related process whether or not to use the position information for the process using the position information (hereinafter referred to as position information use process) according to the authentication level given to the position information transmitted from the in-vehicle device 200. to decide.
  • the flowchart in FIG. 6 may be configured to start when the communication unit 310 of the roadside device 300 receives transmission data transmitted from the in-vehicle device 200, for example.
  • the position information use process corresponds to the positioning result use process.
  • step S41 an authentication level corresponding to the reliability of the position information requested by the position information use process, that is, an authentication level requested by the position information use process is specified.
  • the authentication level required by the location information use process is referred to as a request authentication level (REQ AUTH LV).
  • the request authentication level when there is only one type of position information use process and the request authentication level is a fixed value, the fixed value may be configured as the request authentication level.
  • the request authentication level corresponding to the location information use processing that the roadside device 300 intends to execute is set as the type of location information use processing and the request authentication level. May be configured to be identified with reference to a correspondence relationship associated beforehand.
  • the location information usage process is a charging process that charges for parking in a toll parking area or traveling on a toll road, it is necessary to avoid being charged erroneously.
  • the level high if the location information use process is a process that does not require highly reliable location information, such as a game that uses location information, you can play immediately rather than waiting until the reliability becomes high Therefore, the request authentication level is set low. As described above, the higher the reliability of the position information required in the position information utilization process, the higher the request authentication level.
  • the processing in step S41 may be omitted by specifying in advance when the request authentication level is a fixed value.
  • step S42 transmission data received by the communication unit 310 is acquired from the communication unit 310, and position information, a time stamp, an authentication level, and the like included in the transmission data are acquired.
  • This S42 corresponds to a positioning result reception processing unit.
  • step S43 it is determined whether or not the authentication level acquired in S42 has reached the request authentication level specified in S41.
  • the location information use process is a charging process for charging for parking in a toll parking area or traveling on a toll road. If the request authentication level is 100%, the authentication level acquired in S42 is If it is not 100%, it is determined that the required authentication level has not been reached. On the other hand, if the location information use process is a game that uses location information and the request authentication level is 33%, even if the authentication level acquired in S42 is not 100%, it has reached 33%. It is determined that the required authentication level has been reached.
  • step S43 If it is determined in step S43 that the required authentication level has been reached (YES in S43), the process proceeds to step S44, and the position information acquired in S41 is the target of the position information utilization process. On the other hand, if it is determined that the required authentication level has not been reached (NO in S43), the process proceeds to step S45, and the position information acquired in S42 is not subject to the position information utilization process. Steps S43 to S45 correspond to a usage determination unit.
  • the control unit 320 does not use the position information that is determined not to be the target of the position information use process in the use determination related process for the position information use process.
  • the position information determined to be the target of the position information use process in the use determination related process is used for the position information use process.
  • An example of a charging process for charging for parking in a toll parking area or traveling on a toll road is as follows.
  • the location information that is determined not to be subject to location information usage processing in the usage judgment related processing is not subject to billing even if it falls within the billing target area, and is not charged. On the other hand, if the location information determined to be the location information usage processing target in the usage determination related processing falls under the area to be charged, it is charged and charged.
  • the control unit 320 corresponds to the execution unit.
  • the processing using the position information is executed according to the level of the authentication level given to the position information. It can be determined whether or not. For example, charging processing with high reliability of required location information is not executed unless the authentication level is high, whereas a game with low reliability of required location information is executed even when the authentication level is low. It becomes possible to do.
  • the positioning result receiving device may be a mobile device such as mounted on a vehicle other than the vehicle on which the in-vehicle device 200 is mounted.
  • the position information use process executed by this mobile device for example, the position information received from the in-vehicle device 200 is used, and the distance between the vehicle on which the in-vehicle device 200 is mounted is maintained at an appropriate distance.
  • Modification 2 In the first embodiment, the case where the location information use process is a billing process for charging a toll road (hereinafter referred to as a road billing process) has been described. However, in the configuration of the first embodiment, the vehicle is actually charged. Even when the vehicle is traveling on the road, if the authentication level given to the position information received by the roadside device 300 from the in-vehicle device 200 mounted on the vehicle does not reach the required authentication level of the road billing process, There is a problem that billing is not possible.
  • a road billing process for charging a toll road
  • the modification 2 is the same as that of Embodiment 1 except that the processing in the control unit 320 of the roadside device 300 is partially different.
  • the second modification is different from the first embodiment in that the control unit 320 performs a road billing related process instead of the use determination related process and the position information use process of the first embodiment.
  • the 7 may be configured to start when the communication unit 310 of the roadside device 300 receives the transmission data transmitted from the in-vehicle device 200, for example.
  • a description will be given assuming that the request authentication level corresponding to the road billing process is specified in advance.
  • step S61 transmission data received by the communication unit 310 is acquired from the communication unit 310, and position information, a time stamp, an authentication level, and the like included in the transmission data are acquired.
  • This step S61 also corresponds to the positioning result reception processing unit.
  • step S62 it is determined whether or not the road billing condition is satisfied. For example, when the position indicated by the position information acquired in S61 is located in an area that is subject to road billing, it is determined that the road billing condition is satisfied, and the position indicated by the position information acquired in S61 is the road If it is not located in the area to be charged, it is determined that the road charging condition is not satisfied. If it is determined that the road billing condition is satisfied (YES in S62), the process proceeds to step S63. On the other hand, if it is determined that the road billing condition is not satisfied (NO in S62), the process is terminated.
  • step S63 it is determined whether or not the authentication level acquired in S61 has reached the required authentication level of the road billing process. If it is determined that the required authentication level has been reached (YES in S63), the location information acquired in S61 is set as the object of the road billing process, and the process proceeds to step S73. On the other hand, if it is determined that the requested authentication level has not been reached (NO in S63), the location information acquired in S61 is temporarily not subject to road billing processing, and the process proceeds to step S64. This S63 corresponds to a usage determination unit.
  • step S64 a notification process for notifying the user that there is a possibility of being charged later is performed.
  • the notification process for example, information including an instruction to notify the user that there is a possibility of being charged later is transmitted to the in-vehicle device 200 via the communication unit 310. Then, the vehicle-mounted device 200 notifies the user that there is a possibility of being charged later from a display device or audio output device (not shown).
  • This S64 corresponds to a notification processing unit.
  • step S65 the position information acquired in S61 is stored in an electrically rewritable memory such as a RAM or an EEPROM of the control unit 320.
  • S65 corresponds to a storage processing unit.
  • step S66 when new transmission data is received from the in-vehicle device 200 (YES in S66), the newly received position information, time stamp, authentication level, etc. are acquired, and the process proceeds to step S67. On the other hand, if new transmission data has not been received (NO in S66), the process of S66 is repeated.
  • step S67 it is determined whether or not the road billing condition is not satisfied. If it is determined that the road billing condition is no longer satisfied (YES in S67), the process is terminated. On the other hand, if it is determined that the road billing condition is satisfied (NO in S67), the process proceeds to step S68.
  • step S68 it is determined whether or not the authentication level acquired in S66 has reached the required authentication level of the road billing process. If it is determined that the required authentication level has been reached (YES in S68), the location information acquired in the latest S66 is set as the object of the road billing process, and the process proceeds to step S69. On the other hand, if it is determined that the required authentication level has not been reached (NO in S68), the location information acquired in the most recent S66 is temporarily not subject to road billing processing, and the process returns to S65 and acquired in S66. The position information and the like are stored in the memory and the process is repeated. This S68 also corresponds to the use determination unit.
  • step S69 it is determined whether or not there is continuity between the position information to which the authentication level acquired in S66 has been assigned and the past position information stored in S65. Whether or not there is continuity is determined by whether or not an error between the estimated position estimated from the past position information and the position indicated by the position information to which the authentication level acquired in S66 is within a threshold value. .
  • the threshold is a value that can be arbitrarily set.
  • the estimated position is a position estimated from the position information or the like stored sequentially in S65.
  • the estimated position at the time indicated by the stamp may be estimated. Even when the vehicle speed and the traveling direction are not acquired from the in-vehicle device 200, the vehicle speed and the traveling direction are calculated as described above from the position information of the plurality of points sequentially stored in S65, and the estimated position is estimated. That's fine.
  • step S70 If it is determined in step S70 that there is continuity (YES in S70), the process proceeds to step S71, and the past location information stored in S65 is also subject to road billing processing. On the other hand, if it is determined that there is no continuity (NO in S70), the process proceeds to step S72, and it is determined that the past location information stored in S65 is not subject to road billing processing.
  • This S70 corresponds to a continuity determination unit.
  • step S73 when new transmission data is received from the in-vehicle device 200 (YES in S73), the newly received position information, time stamp, authentication level, and the like are acquired, and the process proceeds to step S74. On the other hand, if new transmission data has not been received (NO in S73), the process of S73 is repeated.
  • step S74 it is determined whether or not the road billing condition is not satisfied. If it is determined that the road billing condition is no longer satisfied (YES in S74), the process proceeds to step S75. On the other hand, if it is determined that the road billing condition is satisfied (NO in S74), the process returns to S73 and the process is repeated.
  • step S75 the charging process corresponding to the section in which the vehicle equipped with the vehicle-mounted device 200 travels on the toll road is performed, and the process ends.
  • This S75 corresponds to the execution unit. For example, if it continues to reach the required authentication level from when it is determined that the road charging condition is satisfied until it is determined that the condition is not satisfied, it is determined that the road charging condition is satisfied and then this condition is satisfied.
  • the billing process is performed according to the interval until it is determined that the condition is no longer satisfied.
  • Modification 3 In the first embodiment, the case where the location information use process is a billing process for charging for parking in a toll parking area (hereinafter referred to as a parking billing process) has been described. Even if the vehicle is parked in the paid parking area, the authentication level given to the position information received by the roadside device 300 from the in-vehicle device 200 mounted on the vehicle has not reached the required authentication level for the parking billing process. In this case, there is a problem that charging cannot be performed.
  • the third modification is the same as the first embodiment except that the processing in the control unit 320 of the roadside device 300 is partially different. Specifically, the third modification is different from the first embodiment in that the control unit 320 performs a parking charge related process instead of the use determination related process and the position information use process of the first embodiment.
  • control part 220 of the vehicle equipment 200 continues and performs the above-mentioned authentication related process, also when the parking of the own vehicle is detected.
  • the control unit 220 may detect the parking of the host vehicle based on whether the parking brake is turned on, the ignition power supply is turned off, or the current position for sequential positioning does not change for a certain period of time.
  • parking charge related processing in the third modification will be described using the flowchart shown in FIG.
  • position information at the time when the authentication level does not reach the required authentication level is also stored sequentially, and the position information at the time when the authentication level reaches the required authentication level is also stored in the past.
  • Handle as a parking billing target.
  • the flowchart of FIG. 9 may be configured to start when, for example, the communication unit 310 of the roadside device 300 receives transmission data transmitted from the in-vehicle device 200.
  • the request authentication level corresponding to the parking billing process is specified in advance.
  • step S81 the position information, time stamp, authentication level, and the like included in the transmission data received by the communication unit 310 are acquired in the same manner as in S61 described above.
  • This S81 also corresponds to the positioning result reception processing unit.
  • step S82 it is determined whether or not the vehicle equipped with the in-vehicle device 200 is parked. Whether or not the vehicle is parked may be determined based on whether or not the vehicle speed is substantially zero when the vehicle speed is acquired from the in-vehicle device 200 in addition to the position information. In addition, it may be configured to determine that the vehicle is parked based on the fact that the current position indicated by the sequentially acquired position information does not change for a certain time or more. This S82 corresponds to a parking determination unit.
  • step S83 it is determined whether or not parking charge conditions are satisfied. For example, when the position indicated by the position information acquired in S81 is located in the area to be charged for parking, it is determined that the parking charge condition is satisfied, and the position indicated by the position information acquired in S81 is the parking charge. When it is not located in the area to be charged, it is determined that the parking charge condition is not satisfied. If it is determined that the parking charge condition is satisfied (YES in S83), the process proceeds to step S84. On the other hand, if it is determined that the parking billing condition is not satisfied (NO in S83), the process is terminated.
  • step S84 it is determined whether or not the authentication level acquired in S81 has reached the required authentication level for the parking billing process. If it is determined that the required authentication level has been reached (YES in S84), the location information acquired in S81 is set as the object of the parking billing process, and the process proceeds to step S94. On the other hand, if it is determined that the required authentication level has not been reached (NO in S84), the location information acquired in S81 is temporarily not subject to the parking billing process, and the process proceeds to step S85.
  • This S84 corresponds to a usage determination unit.
  • step S85 similarly to S64 described above, notification processing is performed to notify the user that there is a possibility of being charged later.
  • This S85 corresponds to a notification processing unit.
  • the process of S85 may be omitted.
  • step S86 the position information acquired in S81 is stored in an electrically rewritable memory such as RAM or EEPROM of the control unit 320.
  • This S86 corresponds to a storage processing unit.
  • step S87 when new transmission data is received from the in-vehicle device 200 (YES in S87), the newly received position information, time stamp, authentication level, and the like are acquired, and the process proceeds to step S88. On the other hand, if new transmission data has not been received (NO in S87), the process of S87 is repeated.
  • step S88 it is determined whether or not parking charge conditions are not satisfied. If it is determined that the parking billing condition is no longer satisfied (YES in S88), the process ends. On the other hand, if it is determined that the parking billing condition is satisfied (NO in S88), the process proceeds to step S89.
  • step S89 it is determined whether or not the authentication level acquired in S87 has reached the required authentication level of the parking billing process. If it is determined that the required authentication level has been reached (YES in S89), the location information acquired in the latest S87 is set as the object of the parking billing process, and the process proceeds to step S90. On the other hand, if it is determined that the required authentication level has not been reached (NO in S89), the location information acquired in the latest S87 is temporarily not subject to parking billing processing, and the process returns to S86 and acquired in S87. The position information and the like are stored in the memory, and the process is repeated. This S89 also corresponds to the use determination unit.
  • step S90 it is determined whether or not there is continuity between the position information to which the authentication level acquired in S87 has been assigned and the past position information stored in S86. Whether or not there is continuity is determined based on whether or not an error between the position indicated by the past position information and the position indicated by the position information to which the authentication level acquired in S66 is within a threshold value. As an example, the determination is made based on whether or not an error between the position indicated by the past position information first stored in the memory at S86 and the position indicated by the position information to which the authentication level acquired at S66 is within a threshold value.
  • the threshold is a value that can be arbitrarily set.
  • step S91 If it is determined in step S91 that there is continuity (YES in S91), the process proceeds to step S92, and the past location information stored in S86 is also subject to the parking billing process. On the other hand, if it is determined that there is no continuity (NO in S91), the process proceeds to step S93, and it is determined that the past location information stored in S86 is not subject to the parking billing process.
  • This S91 corresponds to a continuity determination unit.
  • step S94 when new transmission data is received from the in-vehicle device 200 (YES in S94), the newly received position information, time stamp, authentication level, and the like are acquired, and the process proceeds to step S95. On the other hand, if new transmission data has not been received (NO in S94), the process of S94 is repeated.
  • step S95 it is determined whether or not parking charge conditions are not satisfied. If it is determined that the parking billing condition is no longer satisfied (YES in S95), the process proceeds to step S96. On the other hand, if it is determined that the parking charge condition is satisfied (NO in S95), the process returns to S94 and the process is repeated.
  • step S96 a billing process is performed according to the time when the vehicle equipped with the vehicle-mounted device 200 is parked in the paid parking area, and the process is terminated.
  • S96 corresponds to the execution unit. For example, if it continues to reach the required authentication level from when it is determined that the parking fee condition is satisfied until it is determined that the condition is not satisfied, it is determined that the parking fee condition is satisfied and then this condition is satisfied. Charge processing is performed according to the time until it is determined that the condition is no longer satisfied. The time may be calculated by using the time stamp of the position information.
  • the positioning result utilization system 1 a includes a position information utilization device 400 that is used in a vehicle on which the in-vehicle device 200 is mounted, instead of the roadside device 300, as a positioning result reception device. Is the same as the positioning result utilization system 1 of the first embodiment.
  • the position information utilization device 400 corresponds to a positioning result receiving device.
  • the location information utilization device 400 may be, for example, an in-vehicle navigation device or a mobile terminal used in a vehicle.
  • Examples of the portable terminal applied as the position information utilization device 400 include a portable terminal that has a GPS function but does not perform the above-described authentication-related processing.
  • the location information utilization device 400 is connected to the in-vehicle device 200 through, for example, an in-vehicle LAN, and includes a communication unit 410 and a control unit 420.
  • the communication unit 410 communicates with the communication unit 210 included in the in-vehicle device 200.
  • a case where the in-vehicle device 200 and the position information utilization device 400 communicate via the in-vehicle LAN is taken as an example, but the in-vehicle device 200 and the position information utilization device 400 may perform wireless communication.
  • the control unit 420 is a computer including a CPU, a ROM, a RAM, and the like, and controls the communication unit 410.
  • the CPU executes the program stored in the ROM while using the temporary storage function of the RAM, so that the usage determination related process of the first embodiment, the road charging process of the second modification, and the parking charge of the third modification. A process similar to the process is executed. Therefore, the control unit 420 corresponds to a positioning result reception processing unit, a usage determination unit, an execution unit, a storage processing unit, a continuity determination unit, and a parking determination unit.
  • the positioning results can be flexibly adapted according to the reliability of the positioning results required for the application or system. Can be used for
  • the positioning result utilization system 1b As shown in FIG. 12, the positioning result utilization system 1b according to the third embodiment, except that the vehicle-mounted device 200, the roadside device 300, and the location information utilization device 400 include a portable terminal 500 that also serves as these. For example, it is the same as the positioning result utilization system 1 of the first embodiment.
  • the mobile terminal 500 communicates with the authentication center 120 and performs the above-described authentication-related processing in the same manner as the in-vehicle device 200 described above. Similarly to the on-vehicle device 200 described above, the mobile terminal 500 uses the navigation messages received from the plurality of GPS satellites 2 to determine the current position of the device itself and calculates the authentication level described above. Furthermore, the mobile terminal 500 executes an application that provides a predetermined service by using the current position obtained by positioning. For example, examples of the application include an application for performing the above road billing process and parking billing process, and a game using position information.
  • a multi-function mobile phone such as a smartphone can be cited.
  • an on-vehicle device such as a navigation device that has a GPS function and performs the above-described authentication-related processing may be used.
  • the mobile terminal 500 includes a communication unit 510, a control unit 520, and a satellite receiver 530, as shown in FIG.
  • the navigation message broadcast by the QZS satellite 3 is received by the receiving unit 511 provided in the communication unit 510 of the mobile terminal 500.
  • the communication unit 510 includes a reception unit 511 and a transmission unit 512, and functions in the same manner as the communication unit 210 of the in-vehicle device 200 described above.
  • the satellite receiver 530 also functions in the same manner as the satellite receiver 230 described above.
  • the control unit 520 is a computer including a CPU, a ROM, a RAM, and the like, and controls the communication unit 510 and the satellite receiver 530. Further, the CPU executes the program stored in the ROM while using the temporary storage function of the RAM, thereby executing the authentication related process similar to that of the first embodiment and the position information use related process of FIG. Therefore, S1 corresponds to the positioning unit, S5 corresponds to the authentication information acquisition unit, and S9 to S11 correspond to the authentication unit.
  • position information use related processing processing related to the use of the current position measured by the control unit 520 of the portable terminal 500 (hereinafter referred to as position information use related processing) will be described using the flowchart shown in FIG.
  • position information use related processing an authentication level that is the number and ratio of the GPS satellites 2 that have been authenticated among the GPS satellites 2 used for positioning of the current position is calculated, and the current level is determined according to the calculated authentication level. It is determined whether to use for an application that uses a position (hereinafter referred to as a position use application).
  • the flow chart of FIG. 14 shows that the position use application is activated and the control unit 520 of the mobile terminal 500 is based on navigation messages included in GPS radio waves received from three or more GPS satellites 2. What is necessary is just to set it as the structure started when the present position is measured.
  • step S101 the current position of the own device obtained based on a navigation message included in GPS radio waves received from three or more GPS satellites 2 is acquired.
  • the acquired current position is stored in an electrically rewritable memory such as RAM or EEPROM of the control unit 520.
  • an electrically rewritable memory such as RAM or EEPROM of the control unit 520.
  • step S102 in the same manner as in S22 described above, an authentication level that is the ratio of the GPS satellites 2 that can be authenticated at the present time in the authentication-related processing among the GPS satellites 2 used for positioning of the acquired current position is calculated. .
  • This S102 corresponds to an authentication level calculation unit.
  • the authentication level may be the number of GPS satellites 2 that can be authenticated.
  • step S103 the request authentication level requested by the active location use application is specified.
  • the request authentication level corresponding to the location use application may be specified with reference to a correspondence relationship in which the type of the location use application and the request authentication level are associated in advance.
  • the request authentication level is higher as the reliability of the position information required by the position use application is higher. Note that the processing of S103 may be omitted by specifying in advance when the request authentication level is a fixed value.
  • step S104 similarly to S42 described above, it is determined whether or not the authentication level calculated in S102 has reached the request authentication level specified in S103. If it is determined that the required authentication level has been reached (YES in S104), the process proceeds to step S105, and the position information acquired in S101 is set as the target of the position use application. On the other hand, if it is determined that the required authentication level has not been reached (NO in S104), the process proceeds to step S106, and the position information acquired in S101 is not targeted for the position use application. S104 to S106 correspond to a usage determination unit.
  • the control unit 520 does not use the position information that is determined not to be the target of the position use application in the position information use related process for the position use application.
  • the position information determined to be the target of the position use application in the position information use related process is used for the position use application.
  • the case where the location use application is the above-described road billing process or parking billing process will be described as an example.
  • the location information that is determined not to be subject to the location use application in the location information use related process is not subject to billing even if it falls within the billing target area and is not charged.
  • the location information determined to be the location use application target in the location information use related process if it falls into the area to be charged, it is charged and charged.
  • the control unit 520 corresponds to the execution unit.
  • the mobile terminal 500 it is determined whether or not to execute the position use application according to the authentication level of the navigation message of the GPS satellite 2 used to measure the current position. Therefore, billing processing with high reliability of required location information is not executed unless the authentication level is high, whereas a game with low reliability of required location information is executed even when the authentication level is low. It becomes possible to do.
  • the positioning results are determined according to the reliability of the positioning results required for the application or system. It can be used flexibly.
  • the mobile terminal 500 is not limited to a configuration used in a vehicle, and may be configured to be used by being carried by a person or the like.
  • the location use application may be a game such as orienteering or stamp rally, or a billing process based on the current location for entering a theme park or using an attraction.
  • Modification 4 In the third embodiment, the case where the location use application is a road billing process for charging a toll road is described. However, in the configuration of the third embodiment, the vehicle is actually traveling on a toll road. However, if the authentication level does not reach the required authentication level for road billing processing, there is a problem that billing cannot be performed.
  • Modification 4 is the same as Modification 2 except that the main body that performs processing is the control unit 520 of the mobile terminal 500.
  • the flowchart of FIG. 15 shows, for example, a navigation message included in GPS radio waves received from three or more GPS satellites 2 by the control unit 520 of the mobile terminal 500 when an application for road billing related processing is activated.
  • a configuration may be adopted that starts when the current position of the own device is measured based on the above.
  • step S121 the current position of the own device obtained based on a navigation message included in GPS radio waves received from three or more GPS satellites 2 is acquired.
  • the acquired current position is associated with a time stamp and stored in the memory.
  • steps S122 to S135 is the same as the processing of S62 to S75 of the second modification.
  • the difference is that in S126 and S133, it is determined whether or not a new positioning result has been acquired, and in S124, the display device or voice output device (not shown) provided in the terminal is charged later. There is a point to notify the user that there is a possibility. Therefore, S123 and S128 correspond to a usage determination unit, S124 corresponds to a notification processing unit, S125 corresponds to a storage processing unit, S129 corresponds to a continuity determination unit, and S135 corresponds to an execution unit. Note that the process of S124 may be omitted.
  • Modification 5 is the same as Modification 3 except that the main body that performs the processing is the control unit 520 of the mobile terminal 500.
  • the flowchart in FIG. 16 shows, for example, a navigation message included in GPS radio waves received from three or more GPS satellites 2 by the control unit 520 of the mobile terminal 500 when a parking billing related process application is activated.
  • a configuration may be adopted that starts when the current position of the own device is measured based on the above.
  • step S141 the current position of the own device obtained based on a navigation message included in GPS radio waves received from three or more GPS satellites 2 is acquired.
  • the acquired current position is associated with a time stamp and stored in the memory.
  • steps S142 to S156 is the same as the processing of S82 to S96 of the third modification.
  • the difference is that in S147 and S154, it is determined whether or not a new positioning result has been acquired, and in S145, a display device or voice output device (not shown) provided in the terminal is charged later.
  • S142 corresponds to a parking determination unit
  • S144 and S149 correspond to a usage determination unit
  • S145 corresponds to a notification processing unit
  • S146 corresponds to a storage processing unit
  • S150 corresponds to a continuity determination unit
  • S156 corresponds to the execution unit. Note that the process of S145 may be omitted.
  • each part is expressed as, for example, S1. Furthermore, each part can be divided into a plurality of sub-parts, while the plurality of parts can be combined into one part. Furthermore, each part configured in this manner can be referred to as a circuit, a device, a module, and a means.
  • Each of the above-mentioned plurality of parts or a combination thereof is not only (i) a software part combined with a hardware unit (for example, a computer), but also (ii) hardware (for example, an integrated circuit, As a part of the (wiring logic circuit), it can be realized with or without including the functions of related devices.
  • the hardware unit can be configured inside a microcomputer.
  • a RAND message is generated from the navigation message received by the monitor station 110 from the QZS satellite 3, and parity data is created by the authentication center 120 based on this RAND message. Then, the created parity data is sent to the master control station 130, and the parity data is transmitted from the master control station 130 to the QZS satellite 3.
  • the QZS satellite 3 broadcasts a navigation message including the parity data toward the ground.
  • the in-vehicle device 200 creates a RAND message from the navigation message received from the QZS satellite 3, and creates comparison parity data from this RAND message and the H matrix acquired from the authentication center 120. Then, a configuration in which authentication is performed by comparing the created comparison parity data with the parity data received from the QZS satellite 3 may be adopted.
  • the authentication method described in the above embodiment is merely an example, and another authentication method may be used.

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Abstract

La présente invention concerne un dispositif doté d'une fonction de localisation, le dispositif comprenant : un récepteur de signaux de satellite (230) qui reçoit des signaux provenant d'une pluralité de satellites artificiels qui sont utilisés dans un système de localisation par satellite ; une unité de localisation (S1) qui détermine la position d'un dispositif automatique en fonction des signaux provenant des satellites artificiels ; une unité d'acquisition d'informations de confirmation (S5) qui acquiert à partir d'un centre de confirmation (120) des informations de confirmation qui sont nécessaires pour confirmer que les signaux reçus sont des signaux normaux provenant des satellites artificiels ; une unité de confirmation (S9, S10, S11) qui utilise les informations de confirmation pour confirmer que les signaux reçus sont des signaux normaux provenant des satellites artificiels ; une unité (S22) de calcul de niveau de confirmation qui calcule un niveau de confirmation qui est basé sur le nombre et/ou la proportion des satellites artificiels qui peuvent être confirmés par l'unité de confirmation ; et une unité de traitement (S24) de transmission de résultats de localisation qui transmet les résultats de localisation qui comprennent le niveau de confirmation à un dispositif autre que le dispositif automatique.
PCT/JP2015/000252 2014-02-06 2015-01-21 Dispositif doté d'une fonction de localisation, dispositif de réception des résultats de localisation et système utilisant les résultats de localisation WO2015118820A1 (fr)

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DE112015000673.7T DE112015000673T5 (de) 2014-02-06 2015-01-21 Vorrichtung mit Positionierungsfunktion, Positionierungsergebnisempfangsvorrichtung und Positionierungsergebnisnutzungssystem
SG11201605589PA SG11201605589PA (en) 2014-02-06 2015-01-21 Device with positioning function, positioning result receiving device, and positioning result utilizing system
CN201580007470.3A CN105980883B (zh) 2014-02-06 2015-01-21 带有位置测定功能的装置、位置测定结果接收装置以及位置测定结果利用系统

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JP2014-021628 2014-02-06
JP2014021628A JP6269123B2 (ja) 2014-02-06 2014-02-06 測位機能付き装置、測位結果受信装置、及び測位結果利用システム

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JP6269123B2 (ja) 2018-01-31
SG11201605589PA (en) 2016-08-30
DE112015000673T5 (de) 2016-10-20
CN105980883A (zh) 2016-09-28
JP2015148517A (ja) 2015-08-20

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